Update vendor

vendor/github.com/mudler/cobra-extensions/load.go

@@ -0,0 +1,88 @@
+// Copyright © 2020 Ettore Di Giacinto
+//
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 2 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with this program; if not, see <http://www.gnu.org/licenses/>.
+
+package extensions
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/spf13/cobra"
+)
+
+type Extension struct {
+	AbsPath   string
+	ShortName string
+}
+
+func (e Extension) String() string {
+	return e.ShortName
+}
+
+func (e Extension) Short() string {
+	return e.ShortName
+}
+
+func (e Extension) Path() string {
+	return e.AbsPath
+}
+
+func (e Extension) CobraCommand() *cobra.Command {
+	return &cobra.Command{
+		Use:   fmt.Sprintf("%s --help", e.Short()),
+		Short: fmt.Sprintf("extension: %s (run to show the extension helper)", e.Short()),
+		Long:  ``,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			return e.Exec(args)
+		}}
+}
+
+// Discover returns extensions found in the paths specified and in PATH
+// Extensions must start with the project tag (e.g. 'myawesomecli-' )
+func Discover(project string, extensionpath ...string) []ExtensionInterface {
+	var result []ExtensionInterface
+
+	// by convention, extensions paths must have a prefix with the name of the project
+	// e.g. 'foo-ext1' 'foo-ext2'
+	projPrefix := fmt.Sprintf("%s-", project)
+	paths := strings.Split(os.Getenv("PATH"), ":")
+
+	for _, path := range extensionpath {
+		if filepath.IsAbs(path) {
+			paths = append(paths, path)
+			continue
+		}
+
+		rel, err := RelativeToCwd(path)
+		if err != nil {
+			continue
+		}
+		paths = append(paths, rel)
+	}
+
+	for _, p := range paths {
+		matches, err := filepath.Glob(filepath.Join(p, fmt.Sprintf("%s*", projPrefix)))
+		if err != nil {
+			continue
+		}
+		for _, m := range matches {
+			short := strings.TrimPrefix(filepath.Base(m), projPrefix)
+			result = append(result, Extension{AbsPath: m, ShortName: short})
+		}
+	}
+	return result
+}